Hello everyone, First of all I wan't to thank you for your work, you helped me a lot with all your tutorials. So, here is my problem : I've got two Debian Jessie server (one master & one slave to make a failover system) connected in a DMZ to pfsense. Everything seems to work fine, mysql databases are synchronized until I install ISPConfig on the slave server. I'm able to get into expert mod, insert needed things and it is not giving me any error. BUT, when I connect to ISPConfig's panel, it shows me that mySQL is Offline on both servers And on the Slave monitor, it show me an error telling me that there is a replication error because it is read only... Replication failed. Error: (server) in MySQL server: (localhost) The MySQL server is running with the --read-only option so it cannot execute this statement # SQL: REPLACE INTO server And when I try to connect to the slave ISPConfig it gives me this : 0 db->query(REPLACE INTO sys_session (session_id,date_created,last_updated,session_data,permanent) VALUES ('8l5hrk689m8csv8q21mdiuo6f3',NOW(),NOW(),'s|a:4: and so on.. I understoud that there is a replication error but have no idea how to make things right I saw that read only thing so I looked over the internet to found a workaround but had no luck, every I tried didn't work... Any ideas? Thanks a lot to you guys. Clement.